385660 has 24 divisors (see below), whose sum is σ = 884016. Its totient is φ = 140160.

The previous prime is 385657. The next prime is 385661. The reversal of 385660 is 66583.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 657 + ... + 1096.

It is an arithmetic number, because the mean of its divisors is an integer number (36834).

2³⁸⁵⁶⁶⁰ is an apocalyptic number.

It is an amenable number.

385660 is an abundant number, since it is smaller than the sum of its proper divisors (498356).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

385660 is a wasteful number, since it uses less digits than its factorization.

385660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1773 (or 1771 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 385660 is about 621.0152977182. The cubic root of 385660 is about 72.7894099638.

It can be divided in two parts, 3856 and 60, that added together give a triangular number (3916 = T₈₈).

The spelling of 385660 in words is "three hundred eighty-five thousand, six hundred sixty".